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arXiv 1003.3930hep-ph
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反常U(1)的迹反常和引力耦合

The Trace Anomaly and the Gravitational Coupling of an Anomalous U(1)

Roberta Armillis, Claudio Coriano, Luigi Delle Rose, Luigi Manni

摘要:

我们延长以前的计算TJJ相关,涉及能量动量张量的阿贝尔规范理论和两个矢量电流,混合轴向矢量/矢量电流的情况下。该研究是在类似的情况下进行的手性异常的$AVV$顶点。我们推导出了反常沃德恒等式的一般结构,并利用降维方法给出了它们的一致性检验。通过沃德恒等式和C-不变性证明了形式为$TJ_V J_A$的混合大质量算子为零。其结果的特点是外观的手征和矢量理论的引力耦合的无质量标量自由度,影响软和紫外区的顶点。这与以往在QED和QCD中规范反常和共形反常的有效作用的研究是一致的。

英文摘要:

We extend a previous computation of the TJJ correlator, involving the energy-momentum tensor of an abelian gauge theory and two vector currents, to the case of mixed axial-vector/vector currents. The study is performed in analogy to the case of the $AVV$ vertex for the chiral anomaly. We derive the general structure of the anomalous Ward identities and provide explicit tests of their consistency using Dimensional Reduction. Mixed massive correlators of the form $TJ_V J_A$ are shown to vanish both by Ward identities and by C-invariance. The result is characterized by the appearance of massless scalar degrees of freedom in the coupling of chiral and vector theories to gravity, affecting both the soft and the ultraviolet region of the vertex. This is in agreement with previous studies of the effective action of gauge and conformal anomalies in QED and QCD.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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